Basically, it's a variation on the gold birds I've been making recently, only this time, instead of gold, I've spray painted the birds matte white, in order to imitate the look of plaster.
To do this project, start with an object with an interesting or appealing shape.
I began with two plastic peacocks from my local Salvation Army (@2.99 each).
Next, choose your paint. I went with an outdoor, rust-proofing spray for metal and wood. I know, I know, my object is plastic, but this was the only spray I could find at my local hardware store that was flat/matte enough for my purposes. Just apply the spray in light coats, letting each coat dry for a good 30 minutes before you add another. Work slowly and the paint will likely adhere well enough for indoor display, even if it's not an ideal paint for your object's base material.
And that's it. Once the paint is dry, you have a matte, white object, reminiscent of plaster.